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MD-80 Landing Gear  
User currently offlineB737200 From Malta, joined Feb 2005, 225 posts, RR: 2
Posted (8 years 2 months 1 day 20 hours ago) and read 12927 times:

My question is what is that "bar", I cannot think of a better word for it, at the back of the landing gear on the MD-80. I always wondered what it was, however recently I was asked what it was is by my computer teacher (who's into planes) and I decided I should ask around here seeing that a lot of you airplane technical whizzes hang out in the Tech/Ops forum.

I'll try link a picture but I've never tried that before so lets just hope it works.


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Click here for bigger photo!

Photo © Philippe BLEUS




I'm referring to that thing stuck to the nose gear.

I read something about a stone deflector on a nose gear shot, not sure if it was referring to that bar. Hopefully someone can tell me what it is for sure.

Thanks a lot for your help.


Lady Guinness is ready to fly...
18 replies: All unread, jump to last
 
User currently offlineJamesbuk From United Kingdom, joined May 2005, 3968 posts, RR: 4
Reply 1, posted (8 years 2 months 1 day 19 hours ago) and read 12936 times:

I can think of 2 things which it might be, A stone deflecter or a skid (when the nosewheels pop, instead of noseing it it skids on the skid)

Rgds --James--



You cant have your cake and eat it... What the hells the point in having it then!!!
User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 2, posted (8 years 2 months 1 day 19 hours ago) and read 12917 times:

Its a gravel deflector according to the AS Maintenance Manual.


A Safe Flight Begins With Quality Maintenance On The Ground.
User currently offlineFredT From United Kingdom, joined Feb 2002, 2185 posts, RR: 26
Reply 3, posted (8 years 2 months 1 day 19 hours ago) and read 12914 times:

It's a spray deflector.

Cheers,
Fred



I thought I was doing good trying to avoid those airport hotels... and look at me now.
User currently offlineB737200 From Malta, joined Feb 2005, 225 posts, RR: 2
Reply 4, posted (8 years 2 months 1 day 18 hours ago) and read 12894 times:

Thanks a million.

Just one more question, there also seems to be a "bar" on the rear undercarriage, this however seems to be shaped somewhat differently from the one on the nose; do these "bars" serve the same purpose as the one found on the nose gear?

Once again thanks.



Lady Guinness is ready to fly...
User currently offlineAtlamt From United States of America, joined Sep 2001, 240 posts, RR: 3
Reply 5, posted (8 years 2 months 1 day 13 hours ago) and read 12818 times:

The front is a spray deflector as FredT said. The water coming off the nose wheels has a habit of going straight into the engines without it. The 727 used chined tires to overcome this. Chined tires are expensive and douglas opted for the spray deflector instead.

Here is a pic of a chined tire.


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Photo © Charles Juszczak - Airside Photography



The rear deflector you see is for FOD. The 80's tend to kick up FOD into the engines. Part of our taxi procedures is to deploy flaps to 15 for FOD prevention. The deflector itself is metal and rubber and sits pretty close to the wheels about 6 inches off the ground.



Fwd to MCO and Placard
User currently offlineDeltaGuy From , joined Dec 1969, posts, RR:
Reply 6, posted (8 years 2 months 1 day 13 hours ago) and read 12806 times:

That nose splash guard is only 2"-3" inches off the ground, hence you can't put a chock behind the nose wheel...have to put em both on the mains.

DeltaGuy


User currently offlineNonfirm From United States of America, joined Sep 2005, 434 posts, RR: 0
Reply 7, posted (8 years 2 months 1 day 12 hours ago) and read 12797 times:

The one installed on the nlg is the water or spray deflector and the one on the mlg is the gravel deflector.  airplane 

User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 8, posted (8 years 2 months 1 day 12 hours ago) and read 12796 times:

Quoting DeltaGuy (Reply 6):
That nose splash guard is only 2"-3" inches off the ground, hence you can't put a chock behind the nose wheel...have to put em both on the mains.

It also required a new edition of the DC-9 towbar. It is an inch or so wider than the nosegear lugs without the spray deflector. Most newer models can reach in to catch the lugs on DC-9s but the older one cannot spread far enough for an MD-80.



Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 9, posted (8 years 2 months 1 day 12 hours ago) and read 12790 times:
AIRLINERS.NET CREW
DATABASE EDITOR



Here are some visuals:

http://www.staynehoff.net/Model55_water_ingestion_test.jpg

http://www.staynehoff.net/Premier1_WaterIngestionTest.jpg




...And a video, in Windows and Quicktime.




2H4





Intentionally Left Blank
User currently offlineDeltaGuy From , joined Dec 1969, posts, RR:
Reply 10, posted (8 years 2 months 1 day 10 hours ago) and read 12762 times:

Quoting SlamClick (Reply 8):
It also required a new edition of the DC-9 towbar. It is an inch or so wider than the nosegear lugs without the spray deflector. Most newer models can reach in to catch the lugs on DC-9s but the older one cannot spread far enough for an MD-80.

Yessir, sure does. I remember working the ramp back in the day, andh aving to have two different towbars for such purposes...even though both jets *seem* to be identical in that facet.

DeltaGuy


User currently offlineB737200 From Malta, joined Feb 2005, 225 posts, RR: 2
Reply 11, posted (8 years 2 months 19 hours ago) and read 12702 times:

Once again thanks for clearing things, you've all been EXTREMELY helpful, I really appreciate it.

Regards.



Lady Guinness is ready to fly...
User currently offlineFlyDeltaJets From United States of America, joined Feb 2006, 1860 posts, RR: 2
Reply 12, posted (8 years 1 month 4 weeks 1 day 10 hours ago) and read 12590 times:
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Quoting DeltaGuy (Reply 6):
That nose splash guard is only 2"-3" inches off the ground, hence you can't put a chock behind the nose wheel...have to put em both on the mains.

DeltaGuy

DL's policy is to chock the main's on all A/C



The only valid opinions are those based in facts
User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 13, posted (8 years 1 month 2 weeks 3 days 14 hours ago) and read 12311 times:

Quoting B737200 (Reply 4):
there also seems to be a "bar" on the rear undercarriage, this however seems to be shaped somewhat differently from the one on the nose; do these "bars" serve the same purpose as the one found on the nose gear?

Yes they do, but these two 'bars' keep the rocks and other FOD from entering the engines.



A Safe Flight Begins With Quality Maintenance On The Ground.
User currently offlineHAWK21M From India, joined Jan 2001, 31667 posts, RR: 56
Reply 14, posted (8 years 1 month 2 weeks 3 days 5 hours ago) and read 12244 times:

Quoting FlyDeltaJets (Reply 12):
DL's policy is to chock the main's on all A/C

Are you saying the NLG wheels are never chocked.
regds
MEL



Think of the brighter side!
User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 15, posted (8 years 1 month 2 weeks 3 days ago) and read 12220 times:

In a study done by a university specializing in aviation studies a couple of years ago, every broken spray deflector, submitted for examination, had yellow paint on the bottom.
Hence, NEVER chock the nose wheels on an aircraft so equipped.



One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently offlineFlyDeltaJets From United States of America, joined Feb 2006, 1860 posts, RR: 2
Reply 16, posted (8 years 1 month 2 weeks 19 hours ago) and read 12087 times:
Support Airliners.net - become a First Class Member!

Quoting HAWK21M (Reply 14):
Are you saying the NLG wheels are never chocked.

The nose gear is alos chocked but only the front on MD88/90 a/c



The only valid opinions are those based in facts
User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 17, posted (8 years 1 month 1 week 6 days 15 hours ago) and read 11991 times:

Quoting Avioniker (Reply 15):
Hence, NEVER chock the nose wheels on an aircraft so equipped.

 checkmark  Same with 732's with gravel deflectors.



A Safe Flight Begins With Quality Maintenance On The Ground.
User currently offlineN8076U From United States of America, joined Jun 2006, 425 posts, RR: 9
Reply 18, posted (8 years 1 month 1 week 6 days 14 hours ago) and read 11980 times:

Not sure about other airlines, but at UAL according to the ops manual, you could only chock the nose if the aircraft would be moving in a couple hours (honestly, I don't remember the exact number, but I believe it was 2 or 4 hours), but it was preferrable to chock the mains and to hook up the towbar/tug if possible. If the aircraft would not be moving within the specified time, you had to chock the mains anyways. Unfortunately, it's been a few years since I've had the pleasure, and I am going strictly by memory.

The DC-10-30's we had always got the mains chocked, as the brakes had to be released in order to fuel/load the aircraft, due to the center main gear being tilted differently than the mains.

Chris



Don't blame me, I don't work here...
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